Face mask



FIG. 1 is a front elevation view of a face mask showing my new design, the front and rear sides being identical;

FIG. 2 is a side elevation view thereof, the right and left sides being identical;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a bottom plan view thereof. 

The ornamental design for a face mask, as shown and described. 